D341HD341H法兰不锈钢蝶阀

D341HD341H三偏心金属密封蝶阀

D371WD371W美标对夹式蝶阀

D343HD343H-三偏心蝶阀

D373H-16PD373H-16P对夹不锈钢蝶阀

D643HD643H气动法兰连接金属密封蝶阀

D343HD343H-美标法兰式蝶阀

BDd343HBDd343H硬密封保温蝶阀

D315W/FD315W/F美标高性能凸耳蝶阀

D373HD373H对夹式多层次硬密封蝶阀

D671HD671H气动对夹式硬密封蝶阀

D973HD973H电动对夹式硬密封蝶阀（多层次）